Many times you will want to boot Microsoft Windows in a ‘clean mode’ where no additional drivers are loaded, etc…

Of course, there is also Safe Mode for this, but Safe Mode is a bit more severe, and sometimes, you just need a cleaner/simpler boot, and not necessarily full on safe mode.

See attached PDF, or the following link for how to:
https://support.microsoft.com/en-us/kb/929135

PDF: How to perform a clean boot in Windows

We often times use this method when Windows Update is screwing up, to get a simpler boot process.